Union cannon on Cemetery Ridge points to Seminary Ridge, where 12,000 Rebel troops assembled in a mile-long formation on July 3, 1863, the third and final day of the battle The assault on the center of the Federal line became known as Pickett's Charge. It failed, and Gen. Robert E. Lee withdrew his forces in defeat the next day.
That is how this part of the Gettysburg battlefield became known. It extends along a creek called Plum Run, below Round Top and adjacent to Devil's Den.
This one on Cemetery Ridge, which Union forces held throughout the three days of fighting.